Type-writing machine.



' A. T. BROWN.

TYPE WRITING MACHINE.

APPLICIATIOH rum) 11.2, 1904.

Patented Oct. 4, 1910.

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A. T. BROWN.

TYPE WRITING MACHINE.

APPLICATION FILED n.3, 1904.

Patented Oct. 4, 1 910 3 BEBET8BHEBT 2.

A. T. BROWN,

TYPE WRITING MACHINE.

APPLICATION IILLD APR.2,1904. 971,721. Patented 0ct.4, 1910.

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; Z 351 /5145 nome Q flPSIJ/M ALEXANDER T. BROWN, 0! SYRACUSE, NEW YORK.

TYPE-WRITING- MACHINE.

Specification of Letters Patent.

Patented Oct. 4, 1910.

Application filed April an, moi. flerial no. 201.1260.

1'0 all whom it may concem:

Be it known that I, Annxanosn T. Brown, citizen of the United States, and resident of Syracuse, in the county of Onondaga and State of New York, have invented certain new and useful Im rovements in TypelVriting Machines, 0 which the following is a specification.

The present invention relates more particularly to that class of typewrltmg machines wherein the ty bars are mounted in comparatively smal arcs or segments, another object bein to use flat type bars or those which are avoid of side or lateral bends and to provide such bars with relatively large and steady bearings whereby the alinement may be preserved.

Another object is to shift the type bar so out for u per and lower case writ ng without distur 1n the leverage or afiectmg the operation 0 any part of the type actions.

Other objects will appear hereinafter.

To these and other ends which will hereinafter appear the invention consists of features of construction, arrangements and combinations of devices hereinafter described and more particularly pointed out in the a pended claims.

One mm of the invention is illustrated in the accompanying drawings, forming part hereof, in which,-

Figure 1 is a central vertical longitudinal sectional view of the machine. F i 2 is a vertical transverse sectional view rom the front of the machine with parts omitted. Fi s. 3 and 4 are detail side views of the shifting mechanism. Fig. 5 is a fragmentary detail front view of the sto devices of the case shifting mechanism. ig. 6 is an enlarged detail transverse sectional view of a type bar bearing shown on a smaller scale in ig. 1. Fig. 7 is a sectional view of the same on the line .r-a: of Fig. 6, and locking in the direction of the arrow at said line. Fig. 8 illustrates a modified form of connection with the type bar. Fig. 9 illustrates two ways in whim the key mechanism may be connected with the type bars.

In the drawing the A indicates the base of a suitable framework in which the movable parts are mounted, said framework being provided with standards 1, to the upper end of which the to late 2 is secured. The platen P is carrie ii a suitable carriage (toot shown) and 3 esignates a plate or ust shield that is preferably substantially horizontal in transverse sect-ion and may be part of the top plate which extends across the machine underneath the platen, and forward of the front face thereof as shown in Fig. 1, and slopes backward, whereby scra ings from the paper on the platen will e caught by said plate 3 and may be removed from the machine by brushing and without falling upon the type mechanism, so that the grit or rubbings from the paper cannot reach the bearin s of the type bars and other working parts 0 the type action.

A bar or pivotal support 4 for the type bars is bent into the form of a segment and provided with circumferential grooves 5 to orm ball races that radiate substantially from the printing center. Said bar 4 is carried b arms or links 6 which are ivoted at 7 to t 1e framework 1 of the machine and at 8 to uprights 9, one at each side of the segment, the lower ends of the uprights 9 being carried by rearwardly extendin arms or links 10 which are pivoted to sail upri hts at 10 and to the framework of the mac line at 10. lengths and are in the nature of parallel links which afiord a substantially vertical movement of the segment 4 and one which enables the segment to be in the same vertical plane in both the upper and lower case position of the segment. A bell crank lever 11 which is fulcrluned. at 12 is connected by a link 13 with one of the uprights 9 or the associated arm 10. A bell crank lever 14 is pivoted at 15 on the arm 11 of the lever 11 and is provided with a pin 16 which passes throu h a slot 17 struck in an arc of a circle w ose center is the pivot 15. A hand lever 18 is pivoted at 19 on the lever 11 and is provided with a slot 18" for engagcmcnt with the pin 16 of the lever H. A spring 20 is adjustablv connected with the framewm-k A at one our by a screw 20 and thumb nut- 20" and is connected at the other end 20" with tlu lever 14. The lever 18 operates the lever 14 and so causes the point .20 of attachment of the spring 20 in the lever 14 to be carried above and below the fulcrum 15, as indicated in Figs. 3 and -l,

The arms 6 and 10 are of equal whereby the spring '30 holds the type liar segment 4 in either its up )el' or lower ease msition. (llfl'jllltlillg upon t to position of the hand lever 18. The Iparts are so proportioned and arranged hat the spring 20 exerts a greater leverage when t e type lmr segment is in its u )[Jlll' case ositnm.

The type bars siown in t 10 drawings are ada ted to swing upwardly and rearwartliy to t to fprinting position and each bar consists o a body portion 21 havi n its type bearing end bent upwardly wit] relation thereto when the bar is at rest and provided with a type block 22 having two types thereon, and it is remarked that the bentor goosenccked end of the bar ermits of accurate alinement of the ty e y slightly bending the bent end. The ieel or hub of the type bar is made in two parts and is situated wholly at the same side of the body 21 of the bar and preferably at the same side as the type block '22. The heel is split in semicircular halves and 94 which are joined by screws 25, as shown in Fig. (i so as to make an expansible and contractible split ring or eye and the inner faces of the semicircular segments thus formed are provided with substantially V-grooves as indicated in Fig. 7 so as to provide oppositely disposed sloping walls for purposes presently to appear. Two endless rings or circular plates 26 whose inner and outer faces are conoldal, fit in the grooves of the parts 23 and 2-1 and the inner faces of the rings form race ways for balls 27 lying in the race ways 5 before mentioned. The rin s 26 are supported side by side in the eye 0 the type bars and are forced toward each other by ti hteuing the screws 25, whereby wear may he taken up at anv time and the pressure be regulated by adjusting the screws 25 or one of them. The type bars in their normal positions rest in a basket 28 and afford ready access at all times to the adjusting screws 25 from the front of the machine.

The mechanism shown in the drawings for operating the type bars comprises key operated horizontally dis osed rock shafts 29 that extend fore and a t of the machine, bell crank levers 30 and links 31 that connect the hell cranks to crank arms 31' on the rock shafts and bowed links 32 that are curved first downwardly and then upwardly and connect the bell cranks and tvpe bars. The rock shafts are journaled in the frame A and the keys 33 are held in their upper positions by springs 34 each connected at one end to the frame of the machine and at the other end to a rock shaft. The bell cranks 30 are preferably of a uniform or substantially uniform size and are parallel and fulcrumed in individual. hangers 35 which are connected by screws 35 with the segment 36 secured at its ends to the fixed framework of the machine. The bell cranks and subs-t an! ially horizontally disposed links 32 are thus segmentally arranged and are arranged in substantial aeeordanee with the segmental arrangement of the t at bars and so that the upper endsof the hell cl'tlllltn' are arranged in an are that is substantially coextenslve with and directly in the rear of the are in which the ty e bars are situated. The links 32 are curved m the manner shown so that each link will be bowed in the )ltlllt! 7 of movement of the type bar to which the link is connected and will receive the force applied thereto in the general direction of its len th to alford a resiliency thereof and snei links may be connected withthc type bars by means of rivets or pins 32 passing through perforations in the cars 37 formed on the type bars and throu h eves on the ends of the link, as indicatet in Figs. 1 and 6. One side of each type bar may he milled away where itconnects with the associated link, or the type bars may be rovided with arms 38 0f lenticnlar or sp erical shape formed as indicated in Fig. 8, such arms being perforated and the perforations being countersunk, and the links 32 each being rovidetl with spring arms 39, one of which ms a pin 40 riveted therein and the other being provided with a perforation for receiving the free end of the rivet 40, and said rivet =10 (passing throu h the arm 38 of the associate type bar. his construction affords a relative movement of the type bar and link in more than one direction to avoid cramping the arts in the operation of the machine and tie resiliency of the arms 39 render them separable so that a connection or disconnection between each link and type bar may be readily eilected. By construct ing and connecting the links in the manner shown the reatest extent of cranking or leverage of est: 1 link on its associated bar is aiforded at the initial portion of the printing stroke and each link is substantially concentric with the pivotal center of its asso ciated type bar when the latter is in the printing position and a portion of the We mr is seated in the curve of the link. Tile bell crank levers 30 may he in the nature of three arm levers by providiiig them with arms 41 to which restoring springs 42 are secured to quicken the return of the type mechanism.

One or both of the arms 10 of the shifting mechanism may he provided with an arm 43 whose motlon is limited by oppositelv disposed adjustable stops 44 on the fixet frame of the machine. whereby the shift mechanism is limited in its motion and the proper position of the segnumt in both the niper and lower case position thereof may he determined. The sprinp :20 holds the arm 43 against one or the other of stops #4. according to the position oi lever l l. key 45 is provided for operating the shift lzio mechanism against the force of the spring '20 so that. upon the release of the shift. key 45 the shift mechanism will return the type har segment to the position from which said key moves the same. The key 4.3 operates a roelt shaft or lever 46 which has its crank arm 44% connected by a link 47 with the lever 18 at the mint. 43.

The levers 80 may be placed in front or in rear of the segment 4, as is indicated in Fig. 9. but it is preferred to put them in rear of said segment as it brings the entire ty )e bar bearin s and the bearings of the be l-levers 30 out their 0 erating mechanism under the cover of the plilte 3, whereby they are protected from falling particles and more particularly the grit or rnhbings that may fall from the platen or paper thereon.

It will be understood that by bending the free end of the type bars in the manner shown and by locatm or off-setting the type block and the hub or and of each bar at t to same side of the body portion thereof, a construction is provided which enables the top plate to extend over the )ivotal bearln s of t e ty e bars and into t to recess in the bar thus ormed, so that the top plate may be interposed between the printing line and the pivot bearings of the type bars and yet not interfere with the printing operation of the type bars.

The invention is not limited to the re cise details or arrangements thereof i astrated in the drawings and above described: changes and inversions may be made without departing from the invention.

What I claim as new and desire to secure by Letters Patent, is

1. The combination of a curved har provided with radially arranged hall races, halls therein. type bars. one for each of said races, made with internally grooved semi-circular or segmented hearing parts. conical anunli. a pair for each ty bar and having their external cones cang it within said grooves of said segments. and screws arranged in the planes of the type bars for connecting said segments and varying their relative positions. whereby the type bars may be brought close together and yet be rigid against side play.

2. The combination of a curved liar provided with radially arranged ball races with adjacent races in an are concentric with the printing point. halls in said races. type bars, one for (lltll of so id races and made with internally grooved solni-circular or segmented bearing parts. conical annnli. a pair for each type bar and having their external (ones can 'ht within said grooves of said segments. ant screws arranged in the planes of the type bars for connecting said segments and varying their relative positions, whereby the type bars may be. brought close together and yet be rigid against side play.

3. In a typowriting machine, the combination of a curved bar support having radial hall receivin grmn'es, type bars each having an ex ansib e and contractihle eye that sur- I'Oflllt' s a hall groove of the support, independent hearing members received within the e 'e of each type bar and forming a ball race etween them and which receive a relative ad'ustment by an expansion or contraction 0 the eye of the associated type bar. and balls interposed between said bearing members and said grooved support.

4. In a typewriting machine, the combination of a bar segment having radial ball receiving grooves, type bars each having a seetional eye that surrounds a ball groove of the segment, adjustable means for nnitiw the members of each of said eyes, inde )Qllt ent bearing rings received wlthin an carried b the eye of each t pe bar and forniing a all race between t 1cm and which receive a relative adjustment by a relative adjustment of the members of the eye of the associated type bar, and balls interposed between said bcaring rings and said grooved segment.

5. In a typewriting machine, the combination of a type bar that has its pivotal end split, and means to which access may he gained from the front of the machine and while the type bar is in normal position for uniting sai split portion of the type bar.

6. In a typewritin machine, the combination of a type bar t lat has its pivotal end made in sections, and means to which access may be ained from the front of the machine an while the type bar is in normal position for uniting and effecting a relative adjustment of said sections.

7. In a typewriting machine, the combination of an inwardly and rearwardly striking type bar iaving its pivotal end made in sections, and means that may be adjusted from the front of the machine and while the type bar is in normal position for uniting t to sections and adjusting the bearings thereof.

8. In a front strike typcwriting machine. the combination with a platen, upwardly and rearwardly striking type bars. and a top plate of the machine having a portion thereof interposed between the pivotal portions of the type bars and the front face of the platen to prevent sera dogs or grit that may drop from the front. lace of the platen or the )aper thereon from entering the pivotal warings of the type bars.

9, In a front strike typewriting machine, the combination of an n iwardly and rearwardly striking type bar loving the ty )e or types lhemon and the )ivotal portion 1 wreof off-set from the hm y of the bar and on the same side thereof so as to form a recess in the bar. and a plate sahstantiallv coincident with the top plate of the mac line and extending into said 11519085 in the bar when it l is in the printing position to cover the: pivotal bearing thereof. I

10. In a front strike typewritiug machine, the combination of a platen, an upwardly and rearwardly striking type banhaving the type or ty es thereon and the ivotal porl tion thereo? oil-set from the b y of the bar i and on the same side thereof so as to form a i recess in the bar, the pivotal port1on of the bar being situated in a vertical plane substantially coincident with the front face of the platen, and a fixed plate substantially i coincident with the top plate of the ma- 5 chine and extendin into said recess in the l bar when it is in t e printing position and forward of the ivotal bearing thereof to cover said ivota l bearing.

11. In a ront strike typewrinng machine, the combination of a platen, upwardly and rearwardly striking type bars and a dust fliield that is formed as a part of the top plate of the machine and extends forward of the front face of the laten and covers the pivotal bearings of tie ty e bars.

12. In a front-strike t 'pewrltmg machine, a dust shield arranged :1 ve the ends of the curve of the arc in which the ty e bars are pivoted and extendi in an un roken line across the printing pomt of the machine.

13. In a front'strike typewriting machine, the combination of a series of rearwardly strikin pivoted type bars, the pivotal centers 0 which are arranged in an uprightarc, and a dust shield arranged over the pivots of the ty e bars and above the chord of the arc in w iich said type bars are pivoted and extending nninterruptedly across the printing point.

14. In a root strike typewriting machine, the combination of a platen, a series of upwardly and rearwardly striking pivoted type bars. and a top )late of the machine interposed between tic pivotal beat-luvs of the type bars and the printing line on the platen.

15. In a front strike typewriting machine, the combination of a platen. a series of up wardly and rearwardly striking pivoted type bars. and a top late of the machine interposed between t w pivotal bearings of the I type bars and the printing line on the platen, and which slopes downwardly and rearwardly from the forward edge portion there- 1 of which extends beyond and protects the pivotal [marinas of the type bars.

16. In a front strike typewritinp machine. the combination of n platen. a surit's of upwardly and rearwardly striking pivoted type bars. actuating deviws therefor. and a fixed top plate of the machine that has its front edge extending forward of the iivolal hearings-of the typibarsand forwan afllnfront face of the ilaten and between said pivotal j bearings and front face.- and which prim-("ts the pivotal bearings of the type liars, said i insulating devices and all of the working parts of the machine beneath the top plate and between the front and the rear edge thereof from falling grit or rubbings that may drop from the platen.

l7. In a typewritmg machine the combnmtion of a series of rearwardiy striking pivoted ty(pe bars, a shiftablesegment that carries sai type bars, and a dust-shield that covers the pivotal bearings of said typc bars and which is carried by a fixed portion oi the machine and is fixed against movement with the type bar segment.

11-i. In a typewritin r machine, the combination of a series 0 rearwardly striking pivoted ty ic bars, a shift-able segment that carries sai type bars, and a top plate of the machine that extends above and covers the pivotal bearings of said type bars.

19. In a front strike typewriting machine, the combination of a platen, a segment, a series of upwardly and rearwardly striking pivoted type bars carried thereby, and a fixed plate that is located above the segment and between the pivotal bearings of the type bars and the front face of the laten and which is substantially horizonta in transverse section and protects the pivotal bearings of the type bars from gritor rubbings that may drop from the platen or the paper thereon.

All. The con'ibination of a type bar segment arranged vertically, type bars connected therewith and having their main longitudinal parts to one side of their axes of 100 motion, a platen having its rinting line sub stantially in the vertical one through the axes of said type bars. and a top-plate of the machine covering said bar segn'ient, whereby the t ype mechanism is protected from scrap- 05 inns t 'iat may drop from the platen.

21. A, front strike typewriting machine having ii platen above the frame and a backwardly sloping top plate under said platen and extending forward of the vertical plane 110 tangent to said platen at its front face and t vpe mechanism below said plate whereby the type mechanism is protected from scrapings that may drop from the platen.

2:3. In a front strike typewriting machine, 115 the combination with a curved bar provided with ball races and arranged in a vertical plane. llat type bars provided with ball races and having: both races and type blocks i wholly to one Sltlt' of their main liotlics, balls in said races. n platen having its n'inting line substantially in the vertical plane throngzh the axis of said bar. and a llflt'kwardly sloping: top plate interposed between the platen and bar and covering the type bar lwarings against srrnpings that may drop from the platen.

23. In a typewriting nnu'hine. the combination of a series of wgmcntally arranged upwardly and rmlrwardly striking pivoted 13o I abar; a Hi-t'ltr. ol' acgna-ntall v arranged hcl cranks that vibrate fore and at"! of the machine and which lcrminalc at their upper mills in an arc substantially coextenirc with lhc arc in which the type barn tllt silnalcd. and :1 series of curved link: that extend l'orc and all of the machine and con ncct the type bars and hell clitllli the curve in each link being in a plane mincidcnt or sllllfil'tllllitlll v coincident with the plane of movement of the associated lvpe bar.

24. In a front strike tyl'iewrlting machine, the combination of a pivoted type har, a key opcl'ated rock shaft. a crank on said shaft. a hell crank lever o cratively connected to said shaft. a curved ink between said type bar and hell crank lever and connected to the t ype bar so as to have its greatest leverage on said type bar during the first part of the stroke.

'25. In a front strike. t \-'pewritin; machine, the conthinat ion of a pivoted type bar. a ke operated rock shaft. a crank on said shaft, a hell crank lever havinrr one arm extending forwardly in the machine. a link connecting said forward arm with said crank. and a curved link between the type bar and bell crank lever and connected to said type bar below its pivot, to have its greatest leverage on said bar during the first part of the stroke.

:26. In a front strike t \"pe\\'riting machine, the combination with a type bar turning on a row of halls lying in the plane of motion of sttltl bar. a key operated rock shaft, a crank on said shaft, a bell crank lever having an upstanding and a forwardly extending arm, a link connected to said upstanding arm and to the. type bar below its pivot and having its greatest leverage on said bar during the first part of the stroke and bent in the plane Y of motion of Stlltli type bar to r here stiflnessi and a link connecting said crank on the rock shaft and said forward lever-arm of the belt crank.

52?. In a front-strike typewriting machine, E the comlnnatlon with a tvpe har turning on 1 a row of balls lying in the plane of motion of said bar. a key operated rock shaft, a crank on said shaft. a. hell crank lever. a link connected to the upper arm of said hell crank lcrcr and heat in the plane of mot ion of said type ha! and connected thcrclo to ha re its greatest. lcvcrago thcrcon during the lin-rt part of the stroke acting thereafter with a decreasing leverage, and a link connl-ciillg said crank and a horizontal arm of said ltcli crank lever.

:29. la a front-strike t wwriting machine, the combination of a type bar segment, type hat-s pivoted thereon. parallel motion arms opcratircly connected to and by which said segment moved a and down for shifting the case. bell crank l evers fulcrumed on the main frame, links for connecting the upper arms of said bell crank levers with the type bars. and means for actuating said hell crank levers.

'29. In a typewriting machine. the comhi nation of a kc actuated sub-lever, a type bar. a curved resilient link inter )osed between the ty Je bar and sub-lever, t. 1e curvature of the link being in substantially the same, plane as the plane of movement of the trpe bar, and a series of key actuated rock shafts operatively connected to said sublevers.

30. In a front-strike typewriting machine, the combination of a series of segmentally arranged upwardly and rearwardly striking pivoted type bars, :1 series of segmentally arranged bell cranks that vibrate fore and aft of the machine and which terminate at their upper ends in an are substantially cocxtensive with the are in which the ty e bars are situated. a series of curved lin s that extend fore and aft of the machine and connect the iv )e bars and hell cranks, the curve in each ink being in a plane coincident or substantially coincident. with the planeof movementof the associated type bar, and key actuated rock shafts which extend fore and aft of the machine and which are opcratively connected to said bell cranks.

Signed at. Svracnse, in the county of Onondaga and State of New Yor: this twenty-sixth day of March A. l). 1904.

ALEXANDER T. BRIDVX.

\Yitnesses:

Joint I-I. BARR, (iao. (a Caanan'r. 

